Managed to dig up bits myself in the mean time.
Example below was a Belfast service in 1976
B174 + 5228,5231,5208,5406,5101,5608.
In the final days of Mk2D sets below:
5602 5403 5102 5159 5106 5203 5221 (28/1/08 1750 ex Heuston)
5610 5208 5410 5155 5156 5152 5101 (30/1/08 1750 ex Heuston)